Automatic damper



.Dec. 13, 1927. 1,652,713

, J. M. FACKLER AUTOMATIC DAMPER File Jan-'7, 1927 2 Sheets-Sheet 1 gnwntoz Dec. 13, 1927.

J. M. FACKLER AUTOMATIC DAMPER Filed Jan '7, 1927 2 Sheets-Sheet 2 duotmqs Patented Dec. 13, 1927.

, UNITED STATES PENNSYLVANIA, ASSIGNOR TO NEW HOL LAN D MACHINE COMPANY, OF NEW HOLLAND PENNSYLVANIA.

AUTOMATIC DAMPER.

Application filed January 7, 1927. Serial No. 159,647.

This invention relates to means for automatically controlling the draft through a heating furnace, the object being to provide an appaartus which will leave the smoke pipe substantially unobstructed and which will operate to establish direct draft to the chimney Whenever the fire door is opened, indirect draft being set up when the door is closed. The invention is illustrated in the accompanying drawings and will be hereinafter fully described, the novel features being particularly pointed out in the appended claims.

In the drawings,

view of a portion present invention Figure 2 is an tion;

Figure 3 is an enlarged transverse sec- 2 tion of the smoke pipe;

Figure 4 is a view similar to Figure 3, showing the damper in closed position.

The invention is shown applied to a hotair furnace, the numeral 1 indicating the outer shell or casing, 2 the annular radiator in the upper part of the shell, 3 a portion of the wall of the fire-box, and 4 an air space between the radiator and the fire-box. The smoke-pipe 5 leads from the radiator through the outer shell to the chimney, and the fire box communicates with the radiator through a radial outlet passage 6, located adjacent but at one side of the smoke-pipe. The damper 7, of the usual butterfly type,

88 is located within the radiator between the outlet 6 and the smoke-pipe, and immediately adjacent but at one side of the end of the smoke-pipe, as shown in Fig. 2. It will be seen at once that when the damper is turned horizontally there will be a direct draft from the fire-box to the chimney but when the damper is turned to a vertical position the direct draft to the chimney will be cut oil and the products of combustion will be caused to flow around the furnace through the radiator, imparting heat to the surrounding air within the shell.

The damper is secured upon and carried by a rock shaft 8 which extends along the smoke pipe a short distance and is shown as journalled in bearing lugs 9 provided therefor on the wall of the pipe, it being noted that the shaft is disposed close to the wall so that practically the entire interior of the Figure 1 is a perspective of a furnace having the embodied therein,

enlarged horizontal secplpe is unobstructed and a free flow of the is opened so that smoke which is pivoted upon a bracket 14 secured on the side of the pipe. The lever may be weighted at its free end, as indicated at 15, to lnsure that it will normally lie in its lowest position and hold the damper closed, and the gear 10 fits closely in the slot 11 so as to prevent the escape of gases therethrough. Attached to the lever 13 near the free end thereof is one end of a cable or chain 16 which extends over guide pulleys 17 to a bell crank 18 mounted on the furnace shell adjacent the hinge end of the fire-door 19. A short chain or cable 20 is attached to the bell crank and to a disk 21 on which it is ada ted to wind and said disk is rigid with the hinge lug 22 of the fire-door so that when the door 1s opened, said chain or cable will be wound on the disk 21 and a pull exerted through the connected parts to lift the lever 13, thereby rocking the shaft 8 and opening the damper.

From the foregoing description, taken in connection with the accompanying drawings, it will be seen that I have provided a very simple, inexpensive and efficient device whereby a clear passage through the smokepipe is assured and a direct draft to the chimney is established whenever the fire-door and gases cannot escape therethrough when fuel is being placed on the fire.

Having fully described my invention what I claim as new and desire to secure by Letters Patent, is

1. The combination of a furnace including a radiator, a smoke pipe leading from the radiator, and a fire-door, of a damper within the radiator at one side of the smokepipe, a rock shaft mounted on the wall of the smoke pipe and carrying the damper, a gear secured on the end of the rock shaft and projecting through the side of the smoke-pipe, a second gear mounted on the side of the smoke-pipe and meshing with the gear on the rock shaft, and operative connections between second-mentioned gear and the fire-door whereby when the door is opened the damper will be opened.

2. The combination of a furnace including a fire-box, a fire-door, a radiator in communication with the fire-box, and a smoke pipe leading from the radiator, a. rock shaft extending along one side of the smoke pipe, a damper on the inner end of the rock shaft and located between the smoke pipe and the point of communication between the fire-box and the radiator, the smoke pipe having a slot in its side adjacent the outer end of the rock-shaft, a gear on the outer end of the rock shaft extending into said slot, a bracket secured on the outside of the smoke-pipe over the slot therein, a lever pivotally mounted in said bracket, a gear on said lever meshing with the gear on the rock shaft, and connections between the door whereby when the door is opened the damper will be opened.

In testimony whereof, I have specification.

JOHN M. FACKLER.

signed this lever and the fire 

